( 3 ) the study of multiparticle dynamics , in 用mc模擬和實驗研究發現:能量為91
Another important phenomenon in high energy multiparticle production is the hadronic jets . the jets are selected using the durham algorithm 噴注事件各向異性動力學起伏的這一特性,為圓錐形噴注的產生提供了一個標度。
The cut of phase space , particle type , average multiparticle , etc . no dynamical fluctuation has been observed through event factorial moments analysis 可見,通過對事件階乘矩erraticity的分析,根本就觀測不到任何動力學起伏。
All the simulative results underestimate that of experimental data . this seems that the erraticity analysis of rapidity gaps can be used to check models in multiparticle production 發現模擬結果都與實驗結果有較大的偏離;并且兩個產生器所得結果也有較大區別
, the fractal in space - time evolution in high energy h - h collisions is self - affine , which may trace back to the high anisotropy of phase space of multiparticle final states in these collisions 高能強子-強子碰撞多粒子末態的高度各向異性使得時空演化中的分形結構表現為自仿射。
Making analogy with the " " spin - glass " phase in polymers , peschanski put forward the idea that there exists non - thermal phase transition in multiparticle systems . a parameter xq has been introduced to characterize the non - thermal phase transition 通過類比聚合體中的“自旋玻璃相” , peschanski提出隨機級聯的多粒子產生過程中存在非熱相變,并提出表征相變的特征參數_ q的公式。
In the second part of the thesis , the non - thermal phase transition in high energy collisions is studied in detail in the framework of random cascade model . the relation between the characteristic parameter xq of phase transition and the rank q of moment is obtained using monte carlo simulation , and the existence of two phases in self - similar cascading multiparticle systems is shown . the relation between the critical point qc of phase transition on the fluctuation parameter q is obtained and compared with the experimental results from na22 文章第二部分中,我們用隨機級聯模型對高能碰撞中的非熱相變作了仔細研究,用montecarlo模擬得到了表征相變的特征參數_ q與矩階數q之間的關系,證實了自相似多粒子系統中存在兩相,求出了相變點q = q _ c對起伏參數的依賴關系,并和na22實驗結果進行了比較。